MULTI-TECH SYSTEMS, INC. ======================== MT5634ZLX/E, MT5634ZLX/E-T/2 Card Type Modem Chip Set Unidentified Maximum Modem Rate 56Kbps Maximum Fax Rate 14.4Kbps Data Modulation Bell 103/212A Protocol ITU-T V.22, V.22bis, V.32ter, V.32bis, V.34, K56flex, V.90 Fax Modulation ITU-T V.17, V.29 Protocol Error MNP5, V.42, V.42bis Correction/Compression Fax Class Class I & II Data Bus PCMCIA 55301 +------------------------------------------------------------+ | SUPPORTED COMMAND SET | |------------------------------------------------------------| | Basic AT Commands | |------------------------------------------------------------| | AT, '+++', A/ | |------------------------------------------------------------| | A, E, H, M, P, T, V, W, X, Z | |------------------------------------------------------------| | &C, &F, &G, &R, &T, &W, &Y, &Z | |------------------------------------------------------------| | Extended AT Commands | |------------------------------------------------------------| | \A, \C, \G, \J, \K, \V, \X | |------------------------------------------------------------| | %A, %G | |------------------------------------------------------------| | Special Commands | |------------------------------------------------------------| | "H, -J | |------------------------------------------------------------| | S Registers | |------------------------------------------------------------| | S0, S1, S2, S3, S4, S6, S7, S8, S9, S10, S11, S12, S18, | | S25, S30 | |------------------------------------------------------------| | | |------------------------------------------------------------| | Note: See MHI Help File for full command documentation. | +------------------------------------------------------------+ Proprietary AT Command Set +------------------------------------------------------------+ | AUTO-MODE DETECTION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Nn [cmds] | |--------------+---------------------------------------------| | Description: | Selects various options for the automatic | | | detection and negotiation of protocols | | | during the handshake process if the modem | | | is communicating with a remote modem of | | | dissimilar speed. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | N0 | Auto-mode detection disabled. Handshake | | | begins at line speed designated by the S37 | | | register and the B command. | |--------------+---------------------------------------------| | i N1 | Auto-mode detection enabled. Handshake | | | begins at line speed designated by the S37 | | | register and the B command. Fallback to | | | lower speed if necessary unless in \N1 mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMUNICATIONS MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Mn [cmds] | |--------------+---------------------------------------------| | Description: | Selects communications mode | |--------------+---------------------------------------------| | Command | Mode | |--------------+---------------------------------------------| | i &M0 | Asynchronous mode | |--------------+---------------------------------------------| | &M4 | Hayes autosynchronous mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMUNICATION PROTOCOLS | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Bn [cmds] | |--------------+---------------------------------------------| | Description: | Selects the communication protocol for data | | | calls | |------------------------------------------------------------| | Note: The B command allows the simultaneous selection | | of more than one suffix, enabling multiple protocols. | |------------------------------------------------------------| | Command | Protocol | |--------------+---------------------------------------------| | B0 | ITU-T V.22 at 1200bps or V.21 at 300bps | |--------------+---------------------------------------------| | i B1 | Bell 212A at 1200bps/Bell 103 at 300bps | |--------------+---------------------------------------------| | B2 | ITU-T V.23 at 75/1200bps originate; | | | 1200/75bps answer | |--------------+---------------------------------------------| | B3 | ITU-T V.23 at 1200/75bps answer; 75/1200bps | | | originate | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONFIGURATION PROFILES & CALL STATISTICS | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] &V [cmds] | |--------------+---------------------------------------------| | Description: | Displays active and stored configuration | | | profiles & statistics for last connection | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &V0 | Displays the active configuration, the two | | | stored user profiles, and the first four | | | phone numbers | |--------------+---------------------------------------------| | &V1 | Displays statistics for last connection | +------------------------------------------------------------+ +------------------------------------------------------------+ | DATA SET READY (DSR) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Sn [cmds] | |--------------+---------------------------------------------| | Description: | Selects DSR options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i &S0 | DSR forced high | |--------------+---------------------------------------------| | &S1 | DSR high only while modem is connected | +------------------------------------------------------------+ +------------------------------------------------------------+ | DATA TERMINAL READY (DTR) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Dn [cmds] | |--------------+---------------------------------------------| | Description: | Selects modem response to DTR | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &D0 | Modem does not respond to DTR | |--------------+---------------------------------------------| | &D1 | Modem goes to command mode on DTR toggle | |--------------+---------------------------------------------| | i &D2 | Modem goes to command mode and disconnects | | | (hangs up) on DTR toggle; | | | | | | Auto-Answer is disabled on low DTR. | |--------------+---------------------------------------------| | &D3 | Modem is initialized on DTR toggle | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAL | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] D<#> [cmds] | |--------------+---------------------------------------------| | Description: | Dials telephone number according to any | | | modifiers included in the string | |--------------+---------------------------------------------| | Note: | Any combination of modifiers can be used to | | | produce the desired dial functions in | | | sequence. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | DP | Pulse dialing enabled | |--------------+---------------------------------------------| | DSn | Dial stored telephone number n | |--------------+---------------------------------------------| | DT | Tone dialing enabled/Pulse dialing disabled | |--------------+---------------------------------------------| | DW | Dialing resumed following dial tone | | | detection | |--------------+---------------------------------------------| | D, | Dialing paused for amount of time specified | | | in S8 register | |--------------+---------------------------------------------| | D! | Flash function initiated. Modem commanded | | | to go off-hook for specified time before | | | returning on-hook. | |--------------+---------------------------------------------| | D@ | Wait for quiet Answer function enabled. | | | Modem waits until a "quiet answer," a | | | ring-back signal followed by silence up to | | | the time specified in S7, is received prior | | | to executing the rest of the dial string. | |--------------+---------------------------------------------| | D$ | Calling card "Bong" detection enabled | |--------------+---------------------------------------------| | D; | Modem returned to idle state after dialing. | | | The semicolon can only be placed at the end | | | of the dial command. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Kn [cmds] | |--------------+---------------------------------------------| | Description: | Enables flow control options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &K0 | Flow control disabled | |--------------+---------------------------------------------| | i &K3 | RTS/CTS flow control enabled | |--------------+---------------------------------------------| | &K4 | XON/XOFF flow control enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | JACK TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Jn [cmds] | |--------------+---------------------------------------------| | Description: | Command non-functional; for compatability | | | purposes only | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &J0 | Send OK to DTE | |--------------+---------------------------------------------| | &J1 | Send OK to DTE | +------------------------------------------------------------+ +------------------------------------------------------------+ | ON-LINE | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] On [cmds] | |--------------+---------------------------------------------| | Description: | Controls on-line command (data | | | transmission) state options. | |------------------------------------------------------------| | Note: The O command must be placed at the end of the | | command string. | |------------------------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | O0 | On-line command mode with no retraining | | | enabled | |--------------+---------------------------------------------| | O1 | On-line command mode with retraining | | | enabled | |--------------+---------------------------------------------| | O3-O14 | Force modem to new rate defined by register | | | S62 | +------------------------------------------------------------+ +------------------------------------------------------------+ | PULSE DIALING RATIO (INTERNATIONAL VERSION) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Pn [cmds] | |--------------+---------------------------------------------| | Description: | Selects pulse dial make/break ratio | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &P0 | 39/61ms at 10pps (North America) | |--------------+---------------------------------------------| | &P1 | 33/67ms at 10pps (Europe) | +------------------------------------------------------------+ +------------------------------------------------------------+ | PULSE DIALING RATIO (JAPAN VERSION) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Pn [cmds] | |--------------+---------------------------------------------| | Description: | Selects pulse dial make/break ratio | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &P0 | 33/67ms at 10pps (Europe) | |--------------+---------------------------------------------| | &P1 | 33/67ms at 20pps | +------------------------------------------------------------+ +------------------------------------------------------------+ | RESULT CODES | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Qn [cmds] | |--------------+---------------------------------------------| | Description: | Enables modem to send result codes to the | | | DTE | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i Q0 | Result code sending enabled | |--------------+---------------------------------------------| | Q1 | Result code sending disabled | |--------------+---------------------------------------------| | Q2 | Dumb answer mode enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | SPEAKER VOLUME | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Ln [cmds] | |--------------+---------------------------------------------| | Description: | Controls speaker volume | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | L0 | Low volume setting | |--------------+---------------------------------------------| | L1 | Low volume setting | |--------------+---------------------------------------------| | i L2 | Medium volume setting | |--------------+---------------------------------------------| | L3 | Highest volume setting | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.32 - AUTO-RETRAIN | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Bn [cmds] | |--------------+---------------------------------------------| | Description: | Controls auto-retrain function if poor line | | | quality is detected | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &B0 | Auto-retrain disabled, modem hangs-up | |--------------+---------------------------------------------| | i &B1 | Auto-retrain enabled if line quality is | | | poor. Hang-up if condition persists longer | | | than threshold set by register S7 | |--------------+---------------------------------------------| | &B2 | Modem tolerates any line | +------------------------------------------------------------+ Extended AT Commands +------------------------------------------------------------+ | COMPRESSION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] %Cn [cmds] | |--------------+---------------------------------------------| | Description: | Selects data compression | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | %C0 | Data compression disabled | |--------------+---------------------------------------------| | i %C1 | MNP5 enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONNECT MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] \Nn [cmds] | |--------------+---------------------------------------------| | Description: | Controls the type of connection the modem | | | will operate in | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | \N0 | Normal mode enabled | |--------------+---------------------------------------------| | \N1 | Direct mode enabled | |--------------+---------------------------------------------| | \N2 | Reliable mode enabled | |--------------+---------------------------------------------| | i \N3 | Auto-reliable mode enabled | |--------------+---------------------------------------------| | \N4 | V.42 reliable mode enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] \Qn [cmds] | |--------------+---------------------------------------------| | Description: | Sets type of flow control used by modem | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | \Q0 | Flow control disabled | |--------------+---------------------------------------------| | \Q1 | Bi-directional XON/XOFF flow control | | | enabled | |--------------+---------------------------------------------| | \Q3 | Bi-directional RTS/CTS flow control enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | INACTIVITY TIMER | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] \Tn [cmds] | |--------------+---------------------------------------------| | Range: | 0-90 | |--------------+---------------------------------------------| | Unit: | 1 minute | |--------------+---------------------------------------------| | Description: | Sets the length of time that the modem does | | | not receive information before it | | | disconnects. | +------------------------------------------------------------+ SPECIAL COMMANDS +------------------------------------------------------------+ | DIALING MESSAGE CONTROL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] %Mn [cmds] | |--------------+---------------------------------------------| | Description: | Controls the output of dialing message when | | | dialing a number stored in memory | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i %M0 | Dialing message disabled | |--------------+---------------------------------------------| | %M1 | Dialing message enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | FIRMWARE VERSION | |------------------------------------------------------------| | Type: | Immidiate | |--------------+---------------------------------------------| | Format: | AT [cmds] -V [cmds] | |--------------+---------------------------------------------| | Description: | Displays firmware version number | +------------------------------------------------------------+ +------------------------------------------------------------+ | SERIAL PORT BAUD RATE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $SBn [cmds] | |--------------+---------------------------------------------| | Description: | Sets the maximum allowable data exchange | | | rate at serial port | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $SB300 | 300bps | |--------------+---------------------------------------------| | $SB1200 | 1200bps | |--------------+---------------------------------------------| | $SB2400 | 2400bps | |--------------+---------------------------------------------| | $SB4800 | 4800bps | |--------------+---------------------------------------------| | $SB9600 | 9600bps | |--------------+---------------------------------------------| | $SB19200 | 19.2Kbps | |--------------+---------------------------------------------| | $SB38400 | 38.4Kbps | |--------------+---------------------------------------------| | $SB57600 | 57.6Kbps | |--------------+---------------------------------------------| | i $SB115200 | 115.2Kbps | +------------------------------------------------------------+ S(STATUS) -REGISTERS +------------------------------------------------------------+ | BACKSPACE CHARACTER | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S5=n [cmds] | |--------------+---------------------------------------------| | Range: | 0-127 | |--------------+---------------------------------------------| | Unit: | ASCII | |--------------+---------------------------------------------| | Description: | Selects a character used for backspace | |------------------------------------------------------------| | Note: A value greater than 32 will disable backspace | +------------------------------------------------------------+ +------------------------------------------------------------+ | DCE LINE SPEED | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S37=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the maximum allowable data exchange | | | rate attempted during handshake process. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i S37=0 | Speed of last connection | |--------------+---------------------------------------------| | S37=3 | 300bps | |--------------+---------------------------------------------| | S37=5 | 1200bps | |--------------+---------------------------------------------| | S37=6 | 2400bps | |--------------+---------------------------------------------| | S37=7 | 4800bps | |--------------+---------------------------------------------| | S37=8 | 7200bps | |--------------+---------------------------------------------| | S37=9 | 9600bps | |--------------+---------------------------------------------| | S37=10 | 12.0Kbps | |--------------+---------------------------------------------| | S37=11 | 14.4Kbps | |--------------+---------------------------------------------| | S37=12 | 16.8Kbps | |--------------+---------------------------------------------| | S37=13 | 19.2Kbps | |--------------+---------------------------------------------| | S37=14 | 21.6Kbps | |--------------+---------------------------------------------| | S37=15 | 24.0Kbps | |--------------+---------------------------------------------| | S37=16 | 26.4Kbps | |--------------+---------------------------------------------| | S37=17 | 28.8Kbps | |--------------+---------------------------------------------| | S37=18 | 33.6Kbps | +------------------------------------------------------------+ +------------------------------------------------------------+ | DTE RATE STATUS | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S62=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the DTE rate status | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | S62=0 | 300bps | |--------------+---------------------------------------------| | S62=1 | 600bps | |--------------+---------------------------------------------| | S62=2 | 1200bps | |--------------+---------------------------------------------| | S62=3 | 2400bps | |--------------+---------------------------------------------| | S62=4 | 4800bps | |--------------+---------------------------------------------| | S62=5 | 9600bps | |--------------+---------------------------------------------| | S62=6 | 7200bps | |--------------+---------------------------------------------| | S62=7 | 12.0Kbps | |--------------+---------------------------------------------| | S62=8 | 14.4Kbps | |--------------+---------------------------------------------| | S62=9 | 16.8Kbps | |--------------+---------------------------------------------| | S62=10 | 19.2Kbps | |--------------+---------------------------------------------| | S62=11 | 21.6Kbps | |--------------+---------------------------------------------| | S62=12 | 24.0Kbps | |--------------+---------------------------------------------| | S62=13 | 26.4Kbps | |--------------+---------------------------------------------| | S62=14 | 28.8Kbps | |--------------+---------------------------------------------| | S62=15 | 38.4Kbps | |--------------+---------------------------------------------| | i S62=16 | 57.6Kbps | |--------------+---------------------------------------------| | S62=17 | 115.2Kbps | +------------------------------------------------------------+ +------------------------------------------------------------+ | DTE TRANSFER SPEED | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S72=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the DTE speed during data transfer | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i S72=0 | Last auto-baud | |--------------+---------------------------------------------| | S72=1 | 300bps | |--------------+---------------------------------------------| | S72=2 | 600bps | |--------------+---------------------------------------------| | S72=3 | 1200bps | |--------------+---------------------------------------------| | S72=4 | 2400bps | |--------------+---------------------------------------------| | S72=5 | 4800bps | |--------------+---------------------------------------------| | S72=6 | 9600bps | |--------------+---------------------------------------------| | S72=7 | 7200bps | |--------------+---------------------------------------------| | S72=8 | 12.0Kbps | |--------------+---------------------------------------------| | S72=9 | 14.4Kbps | |--------------+---------------------------------------------| | S72=10 | 16.8Kbps | |--------------+---------------------------------------------| | S72=11 | 19.2Kbps | |--------------+---------------------------------------------| | S72=12 | 21.6Kbps | |--------------+---------------------------------------------| | S72=13 | 24.0Kbps | |--------------+---------------------------------------------| | S72=14 | 26.4Kbps | |--------------+---------------------------------------------| | S72=15 | 28.8Kbps | |--------------+---------------------------------------------| | S72=16 | 38.4Kbps | |--------------+---------------------------------------------| | S72=17 | 57.6Kbps | |--------------+---------------------------------------------| | S72=18 | 115.2Kbps | +------------------------------------------------------------+ +------------------------------------------------------------+ | TRANSMISSION LEVEL (JAPAN) | |------------------------------------------------------------| | Type | Register or Configuration | |-------------+----------------------------------------------| | Format | AT [cmds] S64=n [cmds] | |-------------+----------------------------------------------| | Range | 9-20 | |-------------+----------------------------------------------| | Default | 15 | |-------------+----------------------------------------------| | Unit | -1 dBm | |-------------+----------------------------------------------| | Description | Sets the signal level for transmission | | | (Japan version) | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.90 DOWNSTREAM DATA RATE | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S38=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the maximum allowable V.90 downstream | | | rate attempted during handshake process. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | S38=0 | 56K disabled | |--------------+---------------------------------------------| | S38=1 | 56K automatic speed select | |--------------+---------------------------------------------| | S38=2 | 29.3Kbps | |--------------+---------------------------------------------| | S38=3 | 30.6Kbps | |--------------+---------------------------------------------| | S38=4 | 32.0Kbps | |--------------+---------------------------------------------| | S38=5 | 33.3Kbps | |--------------+---------------------------------------------| | S38=6 | 34.6Kbps | |--------------+---------------------------------------------| | S38=7 | 36.0Kbps | |--------------+---------------------------------------------| | S38=8 | 37.3Kbps | |--------------+---------------------------------------------| | S38=9 | 38.6Kbps | |--------------+---------------------------------------------| | S38=10 | 40.0Kbps | |--------------+---------------------------------------------| | S38=11 | 41.3Kbps | |--------------+---------------------------------------------| | S38=12 | 42.6Kbps | |--------------+---------------------------------------------| | S38=13 | 44.0Kbps | |--------------+---------------------------------------------| | S38=14 | 45.3Kbps | |--------------+---------------------------------------------| | S38=15 | 46.6Kbps | |--------------+---------------------------------------------| | S38=16 | 48.0Kbps | |--------------+---------------------------------------------| | S38=17 | 49.3Kbps | |--------------+---------------------------------------------| | S38=18 | 50.6Kbps | |--------------+---------------------------------------------| | S38=19 | 52.0Kbps | |--------------+---------------------------------------------| | S38=20 | 53.3Kbps | |--------------+---------------------------------------------| | S38=21 | 54.6Kbps | |--------------+---------------------------------------------| | S38=22 | 56.0Kbps | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.90 MODE SELECTION | |------------------------------------------------------------| | Type: | Register | |------------------------------------------------------------| | Format: | AT [cmds] S109=n [cmds] | |--------------+---------------------------------------------| | Description: | Selects modem operating mode | |------------------------------------------------------------| | Command | Function | |---------------+--------------------------------------------| | i S109=0 | V.90 disabled | |---------------+--------------------------------------------| | S109=1 | K56flex or V.90 mode enabled | |---------------+--------------------------------------------| | S109=2 | V.90 mode enabled; K56flex disabled |